One thing I've noticed since looking at the U1 prices, I don't seem to be able to buy them cheaper from china than I can right here in the uk - that is quite unusual imo. In fact, they appear to be a similar price everywhere - which is very unusual. If anything, they seem slightly more expensive in the US than here in the UK.
What is a shame is that I could really do with picking them up for half the price they currently are (couldn't we all I here people shouting), from my calculations there's no chance of getting a decent roi from using them - unless I'm missing something. Of course, if their price doesn't fall over the next month or two then it would be possible to get roi by simply selling and keeping the btc earned as profit - now I think there's a half decent chance that might actually work. In fact, if they lose less than 50% of their current value it might well be possible to turn a profit.